IBM 4810-E3H Installation And Service Manual page 21

Product introduction
March 2009
Table 6. Rear connector icons and descriptions (USB) (continued)
Icon Description
Ethernet LAN cable port
Microphone port
Audio input port
Port for audio output, such as self-amplified speakers or
headphones
Power cord inlet connector
USB, 12V powered port
B
12V
USB, 24V powered port
A
24V
Cash drawer port
Indicates that USB wake devices are supported when attached to
this port
Security screw location
This symbol indicates the location where a security screw can be
optionally installed by a customer to protect access to the inside
of the system unit. (IBM does not provide this screw.) The screw
is an M3 and can protrude into the unit for 6 to 9 mm. The screw
head needs to be a pan head or the equivalent. The screw head
outside diameter is to be 8 mm maximum, and the screw head
height can be up to 3.5 mm.
7
Chapter 1. Introduction